Automatic gas cut-off.



' Patented Dec. I6, |902. A. 'M SHDUGH.

AUTOMATIC GAS CUT-OFF.

(Application mod may 2e, 1902.)

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AUTOMATIC cAs CUT-OFF.

SPECIFICATION forming part of Letters Patent N o. '716,1 19, dated December 16, 1902.

Application filed May 26, 1902.

`Serial No. 108,938. (No model.)

. Be it known thatI, ALEXANDER M. Snoeren,`

` a citizen of the United States, residing at South Charleston, in the county of Clark and State of Ohio, have invented a certain new and useful Improvement in Automatic Gas Out-Offs, of which the following is a specification.

My invention relates to the improvement of automatic gas cut-ods and the objects of my invention are to provide, in conjunction with a gas-supply pipe and valve, improved con-1 struction whereby the cutting off of the gas-` pressure in the supply-pipe results in the valve of said pipe closing automatically and to produce certain improvements in details of construction and operation which will be more fully pointed out hereinafter. These `objects I accomplish in the manner illustrated in the accompanying drawings, in which- Figure 1 is a central vertical section on line of Fig. 2, and Fig. 2 is a sectional view on line/g y of Fig. 1.

Similar `numerals `refer to similar parts throughout both views.

l represents a valve-casing which in the of other suitable well-known construction adapted to cut off communication between4 opposite ends of said casing. The upper tubular extension 1fL of the valve-casing into which the upper end portion ot' lthe valve 2 is designed toproject is in communication with the interior of the Valve-casing body on that side of the valve which is toward the outlet end of. said casing through the medium of a desirable number of openings or ports 3. Se-

cured in connection with the valve-casing extension 1ab is a ring-casing or cylinder 4, with the upper externally-threaded end portion of `which is adj ustably and removably connected the lower portion of an upwardly-extending ring or band 5, the latter being formed with a continuous internal shoulder or enlargement 7, which is designed to clamp upon the upper side of the marginal portion of a flexible disk or diaphragm 8, the lower side of which bears upon the upper end of the cylinder 4t. The disk 8 is preferably of rubber and through the medium of upper and lower nuts 9 is clamped into connection with a centrally -arranged vertical valve-rod 10, this valve-rod havinga ball termination 10,which engages with and bears loosely in a correspondingly-shaped socket in the upper end of the valve 2. The iieXible disk or diaphragm 8 is of such formation that its central portion is depressed in the manner illustrated in Fig. l of the drawings when the valve 2 is in its lowered or closed position. Covering the upper portion of the ring or band 5 is a cap 11, through a central opening in which the upper portion of the rod or stem 10 passes loosely. Rising from the cap l1 on one side of its center, preferably inclining inward, is a bracketarm 12, within the upper bifurcated or slotted end of which is pivoted the inner end and upper portion of a trip arm or bar 13. The pivoted end of this bar 13 is enlarged, as shown, and on said enlarged end is formed an angular recess 14. The outer and smaller end portion of the bar 13 is provided with an adjustable weight-body 15, adapted through the medium of a set-screw 16 to be set at different positions on said bar with relation to its outer end. As indicated in full lines in the drawings, the arm 13 when the valve-rod is in its lowered position rests upon said valverod and holds the valve 2 against upward movement.

` In order to illustrate the operation of my device, I will assume that the valve 2 is closed and that through the medium of a gas-supply pipe gas is contained in the valve-casing 1 on the right-hand side of the valve. In order to turn on the gas or open the valve aud permit the passage of the gas through the valve-.casing to the burners, the rod 10 and bar 13 are raised manually until the disk 8 has its central portion drawn upward above a horizontal position. When the rod 10 is thus raised, the bar 13 is permitted to assume the substantially vertical position indicated in dotted lines in Fig. 1 of the drawings--that is,

with the shoulder. formed by the recess 14 engaging the upper end portion of said rod, said bar being thus supported by the rod. The parts are maintained in this position through the pressure of the gas, which when the valve 2 is opened may pass through the openings 3 and exert a holding pressure on the under side of the disk 8. In order to assist in guiding the valve-rod in its upward movement, I may provide the same, as indicated at 17, with radiallyarranged guidearms Which are adapted to extend to the inner surface of the cylinder 4. In case the supply of gas from the inlet-pipe which connects with the valve-casing should be cut off temporarily, or so nearly cut off as to cause the weight of the bar 13 and the valve 2 to so overcome the pressure of the gas against the underside of the disk as to permit said valve and its rod or stem to drop, it is obvious that the valve will be thus lowered to a closed position and that the bar 13 Will drop to the horizontal position shown in full lines and again bear upon the upper end of the rod l0.

It is Well known that numerous accidents have occurred in ca ses Where the supply of gas to a burner is temporarily cut oft' and again turned on from the fact that the ame is extinguished at the burner and the gas is permitted to escape into the room. By my construction it will readily be understood that the valve Will be automatically closed by a temporary cutting off of the gas-supply to the valve-casing and that gas cannot escape to the burner until the valve has been opened manually in the manner heretofore described, thus avoiding accidents.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is-

In an automatic gas cut-oft, the combination with a valve-casing, a valve therein, a casing extending laterally from and connected with said valve-casing and communieating therewith on one side of the valve, ot' a iexible disk supported in said laterally-extending casing, a cap for the latter, an arm projecting therefrom, a` Weight-bar pivotally connected with said arm and a valve-rod leading from the valve through said cap and connected centrally with said disk, said Weightbar being adapted when said valve-rod is raised to engage the upper end portion of the latter and to drop when said valve-rod is 10W- ered, substantially as specified.

ALEXAN DER M. SHOUGH.

In presence of MEAD LOOKABAUGH, D. C. FUNK. 

